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Group By and IF statement

Group By and IF statement

2007-11-07       - By mysqlman

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Reply:     1     2     3  


I am attempting to get a simple query working:

select *,MAX(a.teaching_date) as max, MIN(a.teaching_date) as min from
teaching a, topic_cat b where a.teaching_topic = b.topic_id or
a.teaching_topic = 999 group by a.teaching_topic order by a.teaching_date
DESC

This all works, except I don't want to 'group by a.teaching_topic' if
a.teaching_topic = 999.

Anyone know how to do this?  Thank you.
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